US5979394A - Method of operating a piston-type internal combustion engine - Google Patents

Method of operating a piston-type internal combustion engine Download PDF

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Publication number
US5979394A
US5979394A US09/082,970 US8297098A US5979394A US 5979394 A US5979394 A US 5979394A US 8297098 A US8297098 A US 8297098A US 5979394 A US5979394 A US 5979394A
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United States
Prior art keywords
engine
internal combustion
cylinders
combustion engine
valves
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Expired - Fee Related
Application number
US09/082,970
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English (en)
Inventor
Fritz Schmidt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler AG
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Publication date
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Assigned to DAIMLERCHRYSLER AG reassignment DAIMLERCHRYSLER AG CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: DAIMLER-BENZ A.G.
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/164—Controlling of coolant flow the coolant being liquid by thermostatic control by varying pump speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/04—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation using engine as brake

Definitions

  • the invention relates to a method of operating a piston-type internal combustion engine with electromagnetically operated intake and exhaust valves, which, in an engine driven phase above a predetermined engine speed, are all closed at least for one cylinder in order to generate a reduced braking torque.
  • a piston-type internal combustion engine including cylinders with gas exchange valves of which at least some are closed when the engine is operated in an engine-driven state above a predetermined engine speed and the engine includes an electrically operated coolant circulating pump wherein the coolant circulating pump speed is controlled depending on the number of cylinders shut down during operation in the engine driven state.
  • the method according to the invention is based on an internal combustion engine with electromagnetically operated intake and exhaust valves.
  • DE 4,236,009A1 discloses a method of controlling such internal combustion engines, whereby during engine-driven operation the engine can be so controlled that it operates in an optimal manner that is with the lowest possible retarding torque as long as braking is not desired. As soon as engine braking is desired, the air mass flow through the internal combustion engine is adjusted for maximum braking torque.
  • Such a method has the advantage that the braking losses of the internal combustion engine during engine-driven operation which may be high particularly in internal combustion engines with quantity control, that is, with gasoline engines, are greatly reduced without interrupting the drive connection with the auxiliary aggregates. As a result, the auxiliary aggregates driven by the internal combustion engine remain fully operational also during engine-driven operation of the vehicle.
  • the method according to the invention also takes into consideration that, in an operating state of the internal combustion engine in which no power for the operation of the vehicle is required and in which the braking power of the internal combustion engine is greatly reduced, also the cooling water flow to be generated by a water pump can be greatly reduced. For this reason, an electric motor driven water pump is provided whose speed is reduced corresponding to the number of cylinders which are inactivated.
  • a cooling system for a vehicle with an internal combustion engine and an electric motor operated speed controlled coolant pump is known from EP 0 499 071 A.
  • the speed of the motor is controlled dependent on the coolant temperature and temperatures of various components.
  • the control acts only in a much delayed manner.
  • the cooling pump motor is controlled with changing engine load, that is, it is properly adjusted already before the heat is transferred to the components or, respectively, the coolant. Consequently, the control is practically delay-free.
  • the temperatures of the internal combustion engine are not critical for cooling
  • the method according to the invention is considered to be useful especially for internal combustion engines employing a quantity control, wherein during normal operation the braking power is especially high. But the method can also be used advantageously in connection with internal combustion engines having a quality control, that is, with Diesel engines. In this application, however, all cylinders are rarely shut down at one time. More often only some of the cylinders are shut down whereas the others operate at higher efficiency with a higher mean pressure. In Diesel engines with pre-chambers, it is known (for example, U.S. Pat. No. 5,454,356) that the communication passages between the prechambers and the main combustion chambers are controlled by an electromagnetic valve in order to reduce the excess charge losses between the prechambers and the main combustion chambers.
  • FIGURE shows a block diagram incorporating the method according to the invention.
  • an internal combustion engine 1 with six cylinders 2-7 includes electromagnetically operated gas change valves (intake and exhaust valves), which are individually controlled by a control unit 10 by way of a control line 45.
  • the control unit 10 is connected by way of a signal transmission line 14 to a vehicle operating state determination unit 9 which, by way of sensor lines 11, 12, 13 determines the vehicle operating state from the position of a gas pedal, a brake pedal or an inclination sensor.
  • a number of cylinders 2-7 is shut down by closing the gas change valves and interrupting the fuel supply thereto.
  • a water pump 19 operated by an electric motor 18 is provided for the cooling of the internal combustion engine 1 and for the cooling and heating of additional aggregates 8. These may comprise a retarder, a transmission cooler, a passenger space heater, an air conditioning system or an apparatus for regenerating braking energy.
  • a coolant duct 24 connects the pump 19 with the internal combustion engine 1 and also with the other aggregates 8.
  • the speed of the water pump 19 is reduced by sending an appropriate control signal from the control unit 10 to the electric motor 18 by way of the signal line 17. In this way, on one hand, the power consumption of the water pump 19 is reduced and, on the other hand, the internal combustion engine 1 does not cool down so fast during engine driven operation.
  • additional electric motors 20, 22 with auxiliary pumps 21, 23 for heating or cooling media which are controllable by way of a signal line 16. These pumps supply cooling or heating fluid to the additional aggregates 8 by way of liquid pipes 25, 26. If all the cylinders 2-7 are shut down so that cooling of the internal combustion engine 1 is not necessary, the electric motor 18 for the cooling water circulation pump 19 can be fully de-energized. The coolant or heating fluid supply for the additional aggregates 8 is then accommodated exclusively by the additional pumps 21, 23.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Valve Device For Special Equipments (AREA)
US09/082,970 1997-05-24 1998-05-21 Method of operating a piston-type internal combustion engine Expired - Fee Related US5979394A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19721756 1997-05-24
DE19721756A DE19721756C1 (de) 1997-05-24 1997-05-24 Verfahren zum Betrieb einer Hubkolbenbrennkraftmaschine

Publications (1)

Publication Number Publication Date
US5979394A true US5979394A (en) 1999-11-09

Family

ID=7830376

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/082,970 Expired - Fee Related US5979394A (en) 1997-05-24 1998-05-21 Method of operating a piston-type internal combustion engine

Country Status (3)

Country Link
US (1) US5979394A (fr)
EP (1) EP0879948B1 (fr)
DE (1) DE19721756C1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6199518B1 (en) * 1998-04-23 2001-03-13 Aisin Seiki Kabushiki Kaisha Cooling device of an engine
US6619258B2 (en) * 2002-01-15 2003-09-16 Delphi Technologies, Inc. System for controllably disabling cylinders in an internal combustion engine
US20030221663A1 (en) * 2002-04-08 2003-12-04 Vanderpoel Richard E. Compact lost motion system for variable valve actuation
US20050150482A1 (en) * 2004-01-09 2005-07-14 Honda Motor Co., Ltd Fuel pump control system for cylinder cut-off internal combustion engine
US6931839B2 (en) 2002-11-25 2005-08-23 Delphi Technologies, Inc. Apparatus and method for reduced cold start emissions
US20050252484A1 (en) * 2002-04-08 2005-11-17 Richard Vanderpoel Compact lost motion system for variable value actuation
US20110197833A1 (en) * 1997-12-11 2011-08-18 Jacobs Vehicle Systems, Inc. Variable Lost Motion Valve Actuator and Method
US20160137030A1 (en) * 2014-11-13 2016-05-19 Ford Global Technologies, Llc Methods and system for heating a hybrid vehicle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012206119A1 (de) 2012-04-13 2013-10-17 Behr Gmbh & Co. Kg Verfahren für einen Kreislauf mit Wärmespeicher
DE102019202915A1 (de) * 2019-03-05 2020-09-10 Ford Global Technologies, Llc Verfahren zur Reduzierung des Bremsmoments einer Brennkraftmaschine im unbefeuerten Schubbetrieb

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0499071A1 (fr) * 1991-02-11 1992-08-19 Behr GmbH & Co. Système de refroidissement pour un moteur à combustion interne d'un véhicule
DE4236009A1 (de) * 1992-10-24 1994-04-28 Bosch Gmbh Robert Verfahren und Vorrichtung zum Steuern des Luftdurchsatzes durch einen Verbrennungsmotor im Schiebebetrieb
US5454356A (en) * 1992-09-14 1995-10-03 Isuzu Ceramics Research Institute Co., Ltd. Engine with pre-chamber

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE499071C (de) 1927-07-06 1930-05-30 I G Farbenindustrie Akt Ges Verfahren zur Herstellung von Azofarbstoffen
JPS57173522A (en) * 1981-04-18 1982-10-25 Mazda Motor Corp Control device of water pump in engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0499071A1 (fr) * 1991-02-11 1992-08-19 Behr GmbH & Co. Système de refroidissement pour un moteur à combustion interne d'un véhicule
US5454356A (en) * 1992-09-14 1995-10-03 Isuzu Ceramics Research Institute Co., Ltd. Engine with pre-chamber
DE4236009A1 (de) * 1992-10-24 1994-04-28 Bosch Gmbh Robert Verfahren und Vorrichtung zum Steuern des Luftdurchsatzes durch einen Verbrennungsmotor im Schiebebetrieb

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8820276B2 (en) 1997-12-11 2014-09-02 Jacobs Vehicle Systems, Inc. Variable lost motion valve actuator and method
US8776738B2 (en) 1997-12-11 2014-07-15 Jacobs Vehicle Systems, Inc Variable lost motion valve actuator and method
US20110197833A1 (en) * 1997-12-11 2011-08-18 Jacobs Vehicle Systems, Inc. Variable Lost Motion Valve Actuator and Method
US6199518B1 (en) * 1998-04-23 2001-03-13 Aisin Seiki Kabushiki Kaisha Cooling device of an engine
US6619258B2 (en) * 2002-01-15 2003-09-16 Delphi Technologies, Inc. System for controllably disabling cylinders in an internal combustion engine
US7152576B2 (en) 2002-04-08 2006-12-26 Richard Vanderpoel Compact lost motion system for variable value actuation
US20050252484A1 (en) * 2002-04-08 2005-11-17 Richard Vanderpoel Compact lost motion system for variable value actuation
CN100420838C (zh) * 2002-04-08 2008-09-24 柴油发动机减震器有限公司 用于实现气阀可变驱动的紧凑型空动系统
US6883492B2 (en) * 2002-04-08 2005-04-26 Jacobs Vehicle Systems, Inc. Compact lost motion system for variable valve actuation
WO2003087544A3 (fr) * 2002-04-08 2004-07-01 Diesel Engine Retarders Inc Systeme compact de perte de mouvement pour actionnement variable de soupape
US20030221663A1 (en) * 2002-04-08 2003-12-04 Vanderpoel Richard E. Compact lost motion system for variable valve actuation
US6931839B2 (en) 2002-11-25 2005-08-23 Delphi Technologies, Inc. Apparatus and method for reduced cold start emissions
US20050150482A1 (en) * 2004-01-09 2005-07-14 Honda Motor Co., Ltd Fuel pump control system for cylinder cut-off internal combustion engine
US7210464B2 (en) * 2004-01-09 2007-05-01 Honda Motor Co., Ltd. Fuel pump control system for cylinder cut-off internal combustion engine
US20070186909A1 (en) * 2004-01-09 2007-08-16 Honda Motor Co., Ltd. Fuel pump control system for cylinder cut-off internal combustion engine
US7516730B2 (en) 2004-01-09 2009-04-14 Honda Motor Co., Ltd. Fuel pump control system for cylinder cut-off internal combustion engine
US20160137030A1 (en) * 2014-11-13 2016-05-19 Ford Global Technologies, Llc Methods and system for heating a hybrid vehicle
US10272741B2 (en) * 2014-11-13 2019-04-30 Ford Global Technologies, Llc Methods and system for heating a hybrid vehicle

Also Published As

Publication number Publication date
EP0879948A2 (fr) 1998-11-25
DE19721756C1 (de) 1998-08-06
EP0879948B1 (fr) 2002-10-02
EP0879948A3 (fr) 1999-07-07

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